I'm reading some urology papers and came across one involving penis growth (Kim & Song, 2008); here's an intro passage that I'm confused about:

A total of 58 patients with constitutionally small penises, without chromosomal anomalies and gene-associated syndromes, intersex, and hypospadias, were included in this study. The average patient age at their first visits was 10 years and the average follow-up period was 2.2 years.

What's a "constitutionally small penis"?


I've read the paper in detail and I don't see where the authors distinguish between a small penis and a "constitutionally small" penis.

Would a "constitutionally small penis" be the same thing as a "micro-penis"? If not, then where do we draw the line?


Kim, K. S., & Song, G. G. (2008). Penile Growth After Puberty in Patients with a Constitutionally Small Penis. Journal of Pediatric Urology, 4, S63. doi: 10.1016/j.jpurol.2008.01.174


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